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She was first married to Kozak, the leader of what was then known as the House of Kozak—a prominent Great House of the Klingon Empire. Kozak was also a notorious drunkard who gambled much of the family's wealth away, accumulating large gambling debts as a result. In 2371, Kozak died after accidentally falling on his own knife at Quark'sbar on Deep Space 9, before he and Grilka could produce a male heir. Seeking to boost business, Quark claimed that he had intentionally killed Kozak in personal combat. Taking this as an opportunity to seize Kozak's holdings, Kozak's enemy D'Ghor traveled to Deep Space 9 and convinced Quark to maintain the story. Because the death was reported to be in combat instead of an accident, the Council was not able to grant special dispensation, which would have allowed Grilka to lead the House on her own.

Traveling to Deep Space 9, she confronted Quark, learning that the death was an accident. Kidnapping Quark, she brought him back to Qo'noS, where she forced Quark to marry her at knifepoint. By doing so, Grilka was able to prevent the council from dissolving her House, which had been temporarily renamed as the House of Quark. Quark and Grilka soon discovered that D'Ghor had been manipulating Kozak financially. When D'Ghor was willing to murder Quark in cold blood, ChancellorGowron realized that Quark's accusations were true. D'Ghor was discommended by Gowron and the High Council. Afterwards, the council granted Grilka special dispensation, allowing her to lead the House on her own. Grilka granted Quark a divorce, and assumed leadership of her House, now known as the House of Grilka. (DS9episode: "The House of Quark")

Before or during the Dominion War Grilka took J'nek, a warrior serving on her ship, as her mate. Near the end of the war she bore him a daughter, Koren. J'nek was killed in action during the war. (STOmission: "Day of Honor")